The trouble is, I cannot seriously imagine living on a severely calorie-restricted diet for the rest of my life.
Fortunately, there is an alternative that seems to offer many of the same benefits — intermittent fasting.
One scientist who has been studying fasting for many years is Professor Valter Longo, the director of the University of Southern California’s Longevity Institute.
When I visited him for BBC Two’s Horizon, he showed me a remarkable little mouse that had been genetically engineered to live longer.
Several months ago I set myself an ambitious goal: to find a way to live longer, stay younger and lose weight.